Fluid supply device

Abstract

To make it possible to hold a catheter with both hands while controlling pressurization or depressurization of a pump.SOLUTION: A fluid supply device can be connected to a medical catheter comprising a balloon, and comprises at least one pump capable of pressurizing or depressurizing the catheter, a fluid passage connecting the catheter and the at least one pump, a hand controller comprising a cylinder and a pusher, a sensor for detecting a parameter to be changed in accordance with the position of the pusher, a control part for controlling the at least one pump in accordance with the parameter, and an attachment part for detachably fixing the hand controller to the fluid passage. The attachment part is provided on the hand controller or the fluid passage.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to a fluid supply device. [Background technology]

[0002] 2. Description of the Related Art Conventionally, there is known a device capable of pressurizing or depressurizing a medical catheter having a balloon at its distal portion using a pump.

[0003] For example, Patent Document 1 discloses a device that allows the pressure increase or decrease in pressure of a pump to be controlled by operating a hand controller. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Special Publication No. 2008-543502 Summary of the Invention [Problem to be solved by the invention]

[0005] The hand controller described in Patent Document 1 is configured to be operated by gripping it with one hand, making it difficult to hold the catheter in the same hand as operating the hand controller. Therefore, it is difficult to pressurize or depressurize the pump by operating the hand controller while holding the catheter in both hands.

[0006] If the catheter is misaligned when pressurizing it, the balloon may not be inflated at the desired position, resulting in ineffective inflation or damage to the blood vessel due to accidental abrasion. Therefore, when pressurizing the catheter, it is desirable to hold the catheter with both hands and adjust the catheter position to prevent it from misaligning.

[0007] Therefore, when controlling the pressure increase or decrease in pressure of the pump using a hand controller as described in Patent Document 1, the medical professional who operates the hand controller and the medical professional who operates the catheter must be different people.

[0008] An object of the present disclosure is to provide a fluid delivery device that allows the catheter to be held with both hands while controlling the pressure increase or decrease in pressure of the pump. [Means for solving the problem]

[0009] The present disclosure provides: [1] A fluid supply device connectable to a medical catheter having a balloon, at least one pump capable of pressurizing or depressurizing the catheter; a fluid passageway connecting the catheter and the at least one pump; a hand controller including a cylinder and a pusher that is slidable within the cylinder; a sensor for detecting a parameter that changes depending on the position of the pusher; a control unit for controlling the at least one pump in response to the parameter; a mounting portion that detachably fixes the hand controller to the fluid passage, The attachment portion is a fluid supply device provided on the hand controller or the fluid passage.

[0010] [2] In the fluid supply device according to [1], The hand controller may be fixed to the fluid passage so that the sliding direction of the plunger is parallel to the extension direction of the catheter connected to the fluid passage in the vicinity of the fluid passage.

[0011] [3] In the fluid supply device according to [1] or [2], The pusher may be pushed in a direction opposite to the direction in which the catheter is viewed from the fluid passage.

[0012] [4] In the fluid supply device according to any one of [1] to [3], the at least one pump comprises a first pump and a second pump; the fluid passage includes a flow path switching valve that switches whether the first pump or the second pump is connected to the catheter; The hand controller may be fixed to the flow path switching valve.

[0013] [5] In the fluid supply device according to any one of [1] to [4], The control unit may switch between controlling the first pump and the second pump depending on the state of the flow path switching valve.

[0014] [6] In the fluid supply device according to any one of [1] to [5], the hand controller further includes a cylinder housing that houses the cylinder; The mounting portion may be installed in the cylinder accommodating portion.

[0015] [7] In the fluid supply device according to any one of [1] to [6], The control unit may cause the pump to perform a pressurizing operation when detecting the operation of pushing in the plunger.

[0016] [8] In the fluid supply device according to any one of [1] to [7], The control unit may change a pressurizing speed when causing the pump to perform a pressurizing operation, in accordance with a change in the parameter caused by the pressing of the plunger.

[0017] [9] In the fluid supply device according to any one of [1] to [8], The control unit may cause the pump to perform a pressure reduction operation when detecting the operation of pulling out the plunger.

[0018]

[10] In the fluid supply device according to any one of [1] to [9], The control unit Controlling a lock mode in which the pump is not operated and an unlock mode in which the pump is operated; When the sensor detects that a predetermined action has been performed on the hand controller, the hand controller may be transitioned from the locked mode to the unlocked mode.

[0019]

[11] In the fluid supply device according to any one of [1] to

[10] , The sensor may be a pressure sensor that detects the pressure of the space pressed by the plunger. [Effects of the Invention]

[0020] According to the present disclosure, it is possible to provide a fluid supply device that allows a catheter to be held with both hands while controlling the pressure increase or decrease in pressure of the pump. [Brief explanation of the drawings]

[0021] [Figure 1] 1 is a functional block diagram showing a schematic configuration of a fluid supply device according to an embodiment of the present disclosure. [Figure 2] FIG. 10 is a diagram showing a state in which the hand controller is fixed to the first flow path switching valve. [Figure 3] FIG. 2 is a diagram illustrating a schematic configuration of a hand controller. [Figure 4] 10A and 10B are diagrams illustrating an example of a state in which a pusher of a hand controller is being pressed. [Figure 5] FIG. 10 is a diagram showing an example of a state in which a push rod of the hand controller is being pulled out. DETAILED DESCRIPTION OF THE INVENTION

[0022] Hereinafter, embodiments of the present disclosure will be described with reference to the drawings.

[0023] In each drawing, the same or corresponding parts are denoted by the same reference numerals. In the description of this embodiment, the description of the same or corresponding parts will be omitted or simplified as appropriate.

[0024] Fig. 1 is a functional block diagram showing a schematic configuration of a fluid supply device 10 according to an embodiment of the present disclosure. Fig. 2 is a diagram showing a state in which a hand controller 13 shown in Fig. 1 is fixed to a first flow path switching valve 21 shown in Fig. 1. Fig. 3 is a diagram showing a schematic configuration of the hand controller 13 shown in Fig. 1.

[0025] The configuration and function of a fluid supply device 10 according to an embodiment of the present disclosure will be described with reference to FIGS.

[0026] As shown in Fig. 1, the fluid supply device 10 can be connected to a catheter 100. The catheter 100 is a medical catheter. As shown in Fig. 2, the catheter 100 includes a tube 101 and a balloon 102. The balloon 102 is provided at the distal portion of the tube 101.

[0027] As shown in FIG. 1 , fluid supply device 10 can be connected to contrast agent reservoir 200. Fluid supply device 10 can receive a contrast agent from contrast agent reservoir 200. Fluid supply device 10 can inject the contrast agent supplied from contrast agent reservoir 200 into catheter 100 as a fluid. Fluid supply device 10 can also extract the contrast agent supplied to catheter 100 as a fluid from catheter 100. Note that the liquid supplied from contrast agent reservoir 200 is not limited to a contrast agent as long as it is a biocompatible liquid. For example, the liquid supplied from contrast agent reservoir 200 may be saline or a mixture of saline and a contrast agent. There may be a plurality of contrast agent reservoirs 200, in which case there may be a plurality of third flow path switching valves 23.

[0028] The fluid supply device 10 can expand the balloon 102 by increasing the amount of contrast agent injected into the catheter 100 to pressurize the catheter 100. The fluid supply device 10 can deflate the balloon 102 by decreasing the amount of contrast agent injected into the catheter 100 to depressurize the catheter 100.

[0029] As shown in FIG. 1, the fluid supply device 10 includes a first pump 11, a second pump 12, a hand controller 13, a sensor 14, a control unit 15, an input unit 16, an output unit 17, a communication unit 18, a filter 19, a first flow path switching valve 21, a second flow path switching valve 22, and a third flow path switching valve 23.

[0030] 1 shows a configuration in which the fluid supply device 10 includes two pumps, a first pump 11 and a second pump 12, but this is just one example. The fluid supply device 10 may include at least one pump. Also, FIG. 1 shows a configuration in which the fluid supply device 10 includes three flow path switching valves, a first flow path switching valve 21, a second flow path switching valve 22, and a third flow path switching valve 23, but this is just one example. The fluid supply device 10 may include at least three flow path switching valves.

[0031] The first pump 11 and the second pump 12 are connected to the catheter 100 via a fluid passage 30 .

[0032] The fluid passage 30 includes a first flow path switching valve 21 and a second flow path switching valve 22. The fluid passage 30 also includes a flow path connecting the first flow path switching valve 21 and the catheter 100, a flow path connecting the first flow path switching valve 21 and the second flow path switching valve 22, a flow path connecting the second flow path switching valve 22 and the first pump 11, and a flow path connecting the first flow path switching valve 21 and the second pump 12. Each of the above-mentioned flow paths may be configured by piping, tubing, or the like. The fluid passage 30 connects the catheter 100 to the first pump 11 and the second pump 12.

[0033] The first pump 11 is connected to the catheter 100 via the second flow path switching valve 22 and the first flow path switching valve 21. The first pump 11 is also connected to the filter 19 and the contrast medium reservoir 200 via the third flow path switching valve 23.

[0034] The first pump 11 can inflate the balloon 102 by increasing the amount of contrast agent injected into the catheter 100 and pressurizing the catheter 100. The first pump 11 can deflate the balloon 102 by reducing the amount of contrast agent injected into the catheter 100 and depressurizing the catheter 100. The first pump 11 may also be connected to a catheter with an open distal end and inject the contrast agent into the patient's body by pressurizing. The first pump 11 may also not be connected to the catheter 100. In this case, the first pump 11 may discharge the contrast agent out of the fluid passage 30 by pressurizing. The first pump 11 may be a pump of any configuration, for example, a syringe-shaped pump. The first pump 11 may include a pressure sensor and a flow rate sensor. The pressure sensor and flow rate sensor measure the pressure and flow rate of the contrast agent when the contrast agent is injected into the balloon 102 and output the values to the output unit 17. Control unit 15 may control the operation of first pump 11 so that the pressure or flow rate matches the value input to input unit 16. The pressure sensor may be a disposable sensor installed in either first pump 11 or the adjacent fluid passage 30. Alternatively, the pressure sensor may be a sensor integrated with first pump 11. When the pressure sensor is integrated with first pump 11, the contrast agent injected into first fluid pump 11 does not come into direct contact with the pressure sensor. For example, when first pump 11 is a syringe-shaped pump, a pressure sensor may be used that detects the reaction force acting on the plunger of the syringe and converts it into a pressure value.

[0035] The second pump 12 is connected to the catheter 100 via a first flow path switching valve 21 .

[0036] The second pump 12 is capable of reducing the pressure in the catheter 100 and sucking out the air inside the catheter 100. The second pump 12 may be a pump of any configuration, and may be, for example, a syringe-shaped pump.

[0037] The operations of the first pump 11 and the second pump 12 when injecting a contrast medium into the catheter 100 will be described later.

[0038] The hand controller 13 is a controller that is operated by a medical professional when controlling the operations of the first pump 11 and the second pump 12.

[0039] The configuration of the hand controller 13 will be described with reference to Fig. 3. The hand controller 13 includes a cylinder 131, a plunger 132, a cylinder housing portion 133, an attachment portion 134, and a tube 135.

[0040] Cylinder 131 may be, for example, the cylinder portion of a syringe.

[0041] The plunger 132 may be, for example, a plunger portion of a syringe. The plunger 132 is slidable within the cylinder 131.

[0042] The cylinder accommodating portion 133 is a container that accommodates the cylinder 131 .

[0043] The attachment portion 134 is a connector that detachably fixes the hand controller 13 to the fluid passage 30. The attachment portion 134 is installed in the cylinder accommodating portion 133. The attachment portion 134 may be, for example, a connector having a C-shaped portion. In this case, the hand controller 13 can be detachably fixed to the fluid passage 30 by fitting the C-shaped portion of the attachment portion 134 into a tubular portion of the fluid passage 30. FIG. 2 shows the hand controller 13 fixed to the first flow path switching valve 21 of the fluid passage 30 by the attachment portion 134.

[0044] Referring again to FIG. 3, the configuration of the hand controller 13 will be described.

[0045] The tube 135 is connected to the tip of the cylinder 131. The tube 135 may pass through the bottom surface 137 of the cylinder accommodating portion 133. That is, the bottom surface 137 of the cylinder accommodating portion 133 may have a hole formed therein for the tube 135 to pass through.

[0046] The inside of cylinder 131 is filled with air. When plunger 132 is pressed, the space inside cylinder 131 is compressed by plunger 132. Therefore, when plunger 132 is pressed in, the pressure in the space inside cylinder 131 increases, and when plunger 132 is pulled out, the pressure in the space inside cylinder 131 decreases. When plunger 132 is pressed in, the pressure in the space inside cylinder 131 increases, so when the medical professional releases plunger 132, plunger 132 returns to its original position.

[0047] Referring again to FIG. 1, the configuration of the fluid supply device 10 will be described.

[0048] The sensor 14 is a sensor that detects a parameter that changes depending on the position of the pusher 132 of the hand controller 13. The parameter that changes depending on the position of the pusher 132 may be, for example, the pressure in the space pushed by the pusher 132, the position of the pusher 132 itself, or the time that has elapsed since the pressure or position changed until it returns. In this embodiment, an example will be described in which the sensor 14 is a pressure sensor that detects the pressure in the space pushed by the pusher 132. The sensor 14 may be, for example, a pressure transducer that is connected to the end of the tube 135.

[0049] The control unit 15 includes at least one processor, at least one programmable circuit, at least one dedicated circuit, or any combination thereof. The processor is a general-purpose processor such as a CPU (Central Processing Unit) or a GPU (Graphics Processing Unit), or a dedicated processor specialized for a specific process. The programmable circuit is, for example, an FPGA (Field-Programmable Gate Array). The dedicated circuit is, for example, an ASIC (Application Specific Integrated Circuit). The control unit 15 controls each part of the fluid supplying device 10 and executes processes related to the operation of the fluid supplying device 10.

[0050] The control unit 15 controls the first pump 11 or the second pump 12 in accordance with a parameter detected by the sensor 14 that changes depending on the position of the plunger 132. When the parameter detected by the sensor 14 is the pressure of the space pressed by the plunger 132, the control unit 15 controls the first pump 11 or the second pump 12 in accordance with the pressure detected by the sensor 14. Hereinafter, the parameter detected by the sensor 14 will be described as the pressure of the space pressed by the plunger 132. Furthermore, the "pressure of the space pressed by the plunger 132" may be simply referred to as "pressure."

[0051] The control unit 15 may switch whether to control the first pump 11 or the second pump 12 in accordance with the pressure detected by the sensor 14, depending on the state of the first flow path switching valve 21. When the first flow path switching valve 21 connects the first pump 11 to the catheter 100, the control unit 15 controls the first pump 11 in accordance with the pressure detected by the sensor 14. When the first flow path switching valve 21 connects the second pump 12 to the catheter 100, the control unit 15 controls the second pump 12 in accordance with the pressure detected by the sensor 14.

[0052] When the control unit 15 detects that the plunger 132 of the hand controller 13 is being pushed in, i.e., when the sensor 14 detects that the pressure inside the cylinder 131 of the hand controller 13 has increased, the control unit 15 causes the first pump 11 or the second pump 12 to perform an operation to pressurize the catheter 100.

[0053] At this time, the control unit 15 changes the pressurization speed when the first pump 11 or the second pump 12 performs the pressurization operation, in accordance with the change in pressure detected by the sensor 14. An example of how the pressurization speed changes in accordance with the change in pressure will be described later.

[0054] When the control unit 15 detects that the plunger 132 of the hand controller 13 is being pulled out, i.e., when the sensor 14 detects that the pressure inside the cylinder 131 of the hand controller 13 has decreased, the control unit 15 causes the first pump 11 or the second pump 12 to perform an operation to depressurize the catheter 100.

[0055] The input unit 16 includes at least one input interface. The input interface is, for example, a physical key, a capacitive key, a pointing device, a touch screen integrated with a display, or a microphone. The input unit 16 accepts an operation to input data used in the operation of the fluid supplying device 10. The input unit 16 may be connected to the fluid supplying device 10 as an external input device instead of being provided in the fluid supplying device 10. The connection interface may be, for example, an interface compatible with standards such as USB (Universal Serial Bus), HDMI (High-Definition Multimedia Interface) (registered trademark), or Bluetooth (registered trademark).

[0056] The output unit 17 includes at least one output interface. The output interface is, for example, a display such as an LCD (Liquid Crystal Display) or an organic EL (Electro Luminescence) display. The output unit 17 may further include a speaker as an output interface. The output unit 17 outputs data obtained by the operation of the fluid supplying device 10. The output unit 17 may be connected to the fluid supplying device 10 as an external output device instead of being provided in the fluid supplying device 10. The connection interface may be, for example, an interface compatible with standards such as USB, HDMI (registered trademark), or Bluetooth (registered trademark).

[0057] The communication unit 18 includes at least one communication interface. The communication interface is, for example, a LAN (Local Area Network) interface. The communication unit 18 can communicate with various devices via a network or directly.

[0058] The filter 19 is a hydrophobic filter that allows air to pass through but does not allow the contrast agent to pass through. The filter 19 is connected to a third flow path switching valve .

[0059] The first flow path switching valve 21 is a valve capable of switching the flow path. The first flow path switching valve 21 may be any valve capable of switching the flow path, for example, a three-way stopcock. The first flow path switching valve 21 may also be configured by combining multiple valves.

[0060] The first flow path switching valve 21 is connected to the first pump 11 via the second flow path switching valve 22. The first flow path switching valve 21 is connected to the second pump 12.

[0061] The first flow path switching valve 21 can switch whether the first pump 11 or the second pump 12 is connected to the catheter 100.

[0062] The second flow path switching valve 22 is a valve capable of switching the flow path. The second flow path switching valve 22 may be any valve capable of switching the flow path, for example, a two-way stopcock. The second flow path switching valve 22 may also be configured by combining multiple valves.

[0063] The second flow path switching valve 22 is connected to the first flow path switching valve 21 and the first pump 11. The second flow path switching valve 22 can switch whether or not the first flow path switching valve 21 and the first pump 11 are connected.

[0064] The third flow path switching valve 23 is a valve capable of switching the flow path. The third flow path switching valve 23 may be any valve capable of switching the flow path, and may be, for example, a three-way stopcock.

[0065] The third flow path switching valve 23 is connected to the first pump 11, the filter 19 and the contrast medium reservoir 200.

[0066] Third flow path switching valve 21 can switch whether filter 19 or contrast medium reservoir 200 is connected to first pump 11.

[0067] Next, a state in which the hand controller 13 is fixed to the first flow path switching valve 21 will be described with reference to Fig. 2. Fig. 2 is a diagram showing a case in which the first flow path switching valve 21 is a three-way stopcock. Although the first flow path switching valve 21 is not limited to a three-way stopcock, the following description will be given taking as an example a case in which the first flow path switching valve 21 is a three-way stopcock.

[0068] The first flow path switching valve 21 includes a pipe 211 , a pipe 212 , a pipe 213 , and a knob 214 .

[0069] The pipes 211, 212, and 213 are rigid pipes. The pipe 211 is connected to the first pump 11 via a tube and the second flow path switching valve 22. The pipe 212 is connected to the second pump 12 via a tube. The pipe 213 is connected to the tube 101 of the catheter 100.

[0070] The knob 214 is a knob that switches the flow path of the first flow path switching valve 21. The knob 214 is rotatable around the Z-axis direction. The knob 214 turns off the connection in the direction in which the longer part of the knob 214 is facing. In the example shown in FIG. 2, the longer part of the knob 214 faces the direction of the pipe 212. Therefore, in the example shown in FIG. 2, the catheter 100 and the first pump 11 are connected. When the longer part of the knob 214 faces the direction of the pipe 211, the catheter 100 and the second pump 12 are connected.

[0071] Information about the state of the knob 214 may be transmitted to the control unit 15. By acquiring the information about the state of the knob 214, the control unit 15 can determine whether the first pump 11 or the second pump 12 is connected to the catheter 100. The control unit 15 may also estimate a change in the orientation of the knob 214 by monitoring the pressure transitions in the first pump 11 and the second pump 12 and the states of the flow path switching valves other than the first flow path switching valve 21. For example, assume that the piping 211 and the first pump 11 are in communication with each other, the internal pressure of the piping 211 is higher than the internal pressure of the piping 213, and the longer portion of the knob 214 is facing the direction of the piping 211. In this case, if the longer portion of the knob 214 is switched toward the piping 212, the first pump 11 and the piping 213 are in communication with each other, and the internal pressure of the first pump 11 decreases. In this way, by understanding the pressure transition and the states of the flow path switching valves other than the first flow path switching valve 21, it is possible to infer a change in the knob orientation of the first flow path switching valve 21.

[0072] When the first pump 11 is connected to the catheter 100, the control unit 15 controls the first pump 11 in response to the operation of the hand controller 13. When the second pump 12 is connected to the catheter 100, the control unit 15 controls the second pump 12 in response to the operation of the hand controller 13.

[0073] 2, the attachment portion 134 of the hand controller 13 is attached to the pipe 213 of the first flow path switching valve 21. In this way, the hand controller 13 is fixed to the first flow path switching valve 21.

[0074] 2 is just an example, and the attachment portion 134 may be attached to the pipe 211 of the first flow path switching valve 21. Alternatively, the attachment portion 134 may be attached to any location in the fluid passage 30 other than the first flow path switching valve 21.

[0075] 2, when the hand controller 13 is fixed to the first flow path switching valve 21, the hand controller 13 is fixed to the first flow path switching valve 21 so that the sliding direction of the plunger 132 is parallel to the extending direction of the catheter 100 near the first flow path switching valve 21. Here, the vicinity of the first flow path switching valve 21 may be a place where the direction of the catheter 100 coincides with the direction of the piping 213, such as a place within a few centimeters or within 10-odd centimeters from the first flow path switching valve 21.

[0076] 2, the extension direction of the catheter 100 near the first flow path switching valve 21 is the X-axis direction. The sliding direction of the plunger 132 is also the X-axis direction. Therefore, the sliding direction of the plunger 132 is parallel to the extension direction of the catheter 100 near the first flow path switching valve 21.

[0077] By fixing the hand controller 13 to the first flow path switching valve 21 in this orientation, the medical professional can hold the catheter 100 in his / her left hand and the catheter 100, the first flow path switching valve 21, and the hand controller 13 in his / her right hand, and operate the hand controller 13 with natural movements of his / her right hand.

[0078] 2, the pushing direction of the plunger 132 of the hand controller 13 is the positive X-axis direction, which is opposite to the negative X-axis direction as viewed from the first flow path switching valve 21 toward the catheter 100.

[0079] By setting the pushing direction of the push rod 132 of the hand controller 13 in this way, the medical staff can operate the push rod 132 of the hand controller 13 with the natural movement of the thumb of the right hand.

[0080] Fig. 4 shows an example of a medical professional pressing in the plunger 132 of the hand controller 13. Fig. 5 shows an example of a medical professional pulling out the plunger 132 of the hand controller 13.

[0081] As shown in Figures 4 and 5, the medical professional can hold the catheter 100, the first flow path switching valve 21, and the hand controller 13 in his or her right hand. Therefore, the medical professional can hold the catheter 100 with both hands. Also, as shown in Figures 4 and 5, the medical professional can easily operate the plunger 132 of the hand controller 13 with the thumb of his or her right hand. Therefore, the medical professional can hold the catheter 100 with both hands and operate the fluid supply device 10 by himself or herself.

[0082] Furthermore, the medical staff can pressurize or depressurize the catheter 100 by pushing or pulling the plunger 132 of the hand controller 13, which allows them to intuitively pressurize or depressurize the catheter 100. For example, when using a button to pressurize or depressurize the catheter 100, it is difficult to distinguish between pressurization and depressurization, increasing the possibility of erroneous operation, but the plunger 132 can be operated intuitively, reducing the possibility of erroneous operation.

[0083] <Injection of contrast agent> With reference to FIG. 1, the basic operation of the fluid supply device 10 when injecting a contrast medium into the catheter 100 will be described.

[0084] The medical professional operates third flow path switching valve 23 to connect first pump 11 to contrast medium reservoir 200. The medical professional fills first pump 11 with contrast medium from contrast medium reservoir 200. At this stage, second flow path switching valve 22 is closed. Also, at this stage, catheter 100 is not connected to fluid supply device 10.

[0085] The medical professional operates third flow path switching valve 23 to connect first pump 11 and filter 19. The medical professional pushes the contrast medium from first pump 11 toward filter 19. Because filter 19 allows air to pass through but not contrast medium, this operation allows the air contained in the contrast medium to be removed. When all the air has been removed, the internal pressure of first pump 11 rises, and therefore the operation of removing the air can be terminated by monitoring the internal pressure of first pump 11.

[0086] After removing the air contained in the contrast medium, the medical professional closes third flow path switching valve 23 and opens second flow path switching valve 22 to push the contrast medium from first pump 11 toward first flow path switching valve 21. This causes the flow path between first flow path switching valve 21 and second flow path switching valve 22 to be filled with the contrast medium.

[0087] The medical professional connects the catheter 100 to the fluid delivery device 10 .

[0088] The medical staff operates the first flow path switching valve 21 to connect the second pump 12 and the catheter 100. The medical staff operates the hand controller 13 to reduce the pressure in the catheter 100, and aspirate the air inside the catheter 100.

[0089] The medical professional operates the first flow path switching valve 21 to connect the first pump 11 and the catheter 100. The medical professional operates the hand controller 13 to inject a contrast agent into the catheter 100. At this time, the medical professional can increase or decrease the pressure in the catheter 100 by operating the hand controller 13 to increase or decrease the amount of contrast agent injected into the catheter 100.

[0090] <Controlled by hand controller> An example of how the first pump 11 is controlled by operating the hand controller 13 will be described below.

[0091] When the plunger 132 of the hand controller 13 is pressed in, the sensor 14 detects that the pressure has increased. When the plunger 132 of the hand controller 13 is pulled out, the sensor 14 detects that the pressure has decreased. The control unit 15 controls the first pump 11 in accordance with the pressure detected by the sensor 14 to pressurize or depressurize the catheter 100.

[0092] The control unit 15 may control the first pump 11 in a continuous pressurization mode or a stepwise pressurization mode.

[0093] When controlling in the continuous pressure application mode, the control unit 15 applies pressure to the catheter 100 while the plunger 132 of the hand controller 13 is being pressed.

[0094] When controlling in the stepwise pressure mode, the control unit 15 pressurizes the catheter 100 by a predetermined amount when the plunger 132 of the hand controller 13 is pressed once. The predetermined amount may be, for example, 1 atmosphere.

[0095] The control unit 15 may change the speed at which pressure is applied to the catheter 100 depending on the depth to which the plunger 132 of the hand controller 13 is pushed in. For example, the control unit 15 may pressurize the catheter 100 at a high speed when the plunger 132 is pushed in deeply, and may pressurize the catheter 100 at a low speed when the plunger 132 is pushed in shallowly.

[0096] When the control unit 15 detects that the plunger 132 of the hand controller 13 has been pulled out, it depressurizes the catheter 100. The control unit 15 may control the first pump 11 in a continuous depressurization mode or a stepwise pressurization / depressurization mode. When controlled in the continuous depressurization mode, the control unit 15 depressurizes the catheter 100 while the plunger 132 of the hand controller 13 is being pulled out. When controlled in the stepwise depressurization mode, the control unit 15 depressurizes the catheter 100 by a predetermined amount each time the plunger 132 of the hand controller 13 is pulled out once. The predetermined amount may be, for example, 1 atmosphere, or may be an amount obtained by adding or subtracting a certain amount from the pressurized air pressure. When the pressure has been reduced to below atmospheric pressure, the pressure may be increased to atmospheric pressure by pressing the plunger 132 of the hand controller 13.

[0097] <Lock mode> When the first pump 11 or the second pump 12 is controlled by the hand controller 13, if the plunger 132 is pressed by an unintentional operation, the catheter 100 will be unintentionally pressurized, which is dangerous. Therefore, the control unit 15 may control a lock mode and an unlock mode.

[0098] The lock mode is a mode in which the first pump 11 and the second pump 12 are not operated even when the hand controller 13 is operated. The unlock mode is a mode in which the first pump 11 or the second pump 12 is operated when the hand controller 13 is operated. As another form, the lock mode is a mode in which the second flow path switching valve 22 and the third flow path switching valve 23 are switched to separate the catheter 100 from the first pump 11 and to connect the filter 19 or the contrast medium reservoir 200 to the first pump 11. The unlock mode is a mode in which the second flow path switching valve 22 and the third flow path switching valve 23 are switched to connect the catheter 100 to the first pump 11. Note that the states of the second flow path switching valve 22 and the third flow path switching valve 23 in the unlock mode are not limited to this.

[0099] By setting the hand controller 13 to the lock mode before the medical professional starts operating the hand controller 13, it is possible to prevent the first pump 11 or the second pump 12 from operating when the plunger 132 is pressed unintentionally, thereby preventing contrast medium from being pushed into the catheter 100.

[0100] The transition from the lock mode to the unlock mode may be executed by a predetermined operation being performed on the hand controller 13. For example, the control unit 15 may transition from the lock mode to the unlock mode when it detects that the pusher 132 of the hand controller 13 has been pressed and held. Alternatively, the transition from the lock mode to the unlock mode may be performed by another medical professional via the input unit 16. Because an operation such as a long press is not performed unless intentionally performed by a medical professional, the control unit 15 can transition from the lock mode to the unlock mode only when intentionally operated by a medical professional.

[0101] As described above, the fluid supply device 10 according to this embodiment includes the first pump 11 and the second pump 12 that can pressurize or depressurize the catheter 100, a fluid passage 30 that connects the catheter 100 to the first pump 11 and the second pump 12, a hand controller 13, a sensor 14, a control unit 15, and an attachment unit 134 that detachably fixes the hand controller 13 to the fluid passage 30. As described above, since the hand controller 13 and the fluid passage 30 are integrated, the medical recipient can hold the catheter 100 with both hands while controlling the pressurization or depressurization of the first pump 11 or the second pump 12.

[0102] The present disclosure is not limited to the above-described embodiments. For example, multiple blocks shown in the block diagrams may be integrated, or a single block may be divided. Instead of executing multiple steps shown in the flowcharts in chronological order as described, steps may be executed in parallel or in a different order depending on the processing capabilities of the device executing each step, or as needed. Other modifications are possible within the scope of the present disclosure.

[0103] For example, in the above-described embodiment, the fluid supply device 10 is configured to include one control unit 15, but the control unit 15 may be divided into multiple units.

[0104] For example, in the above-described embodiment, the configuration has been described in which the attachment portion 134 is provided in the cylinder accommodating portion 133 of the hand controller 13, but the hand controller 13 does not have to include the cylinder accommodating portion 133. In this case, the attachment portion 134 may be provided in the cylinder 131 of the hand controller 13.

[0105] For example, in the above-described embodiment, the configuration in which the attachment portion 134 is provided on the hand controller 13 has been described, but the attachment portion 134 may also be provided on the fluid passage 30. In this case, the attachment portion 134 may be provided, for example, on the first flow path switching valve 21 of the fluid passage 30. When the attachment portion 134 is provided on the first flow path switching valve 21, the attachment portion 134 may be provided, for example, on the pipe 211 or the pipe 213 of the first flow path switching valve 21 shown in FIG. [Explanation of symbols]

[0106] 10 Fluid supply device 11 First Pump 12 Second Pump 13 Hand Controller 14 Sensors 15 Control Unit 16 Input section 17 Output section 18 Communications Department 19 Filters 21 First flow path switching valve 22 Second flow path switching valve 23 Third flow path switching valve 30 Fluid passage 100 catheters 101 Tube 102 Balloon 131 cylinders 132 Pusher 133 Cylinder housing 134 Mounting part 135 tubes 137 bottom 200 Contrast medium reservoir 211, 212, 213 Piping 214 knob

Claims

1. A fluid supply device connectable to a medical catheter, comprising: at least one pump capable of pressurizing or depressurizing the catheter; a fluid passageway connecting the catheter and the at least one pump; a hand controller including a cylinder and a pusher that is slidable within the cylinder; a sensor for detecting a parameter that changes depending on the position of the pusher; a control unit for controlling the at least one pump in response to the parameter; a mounting portion that detachably fixes the hand controller to the fluid passage, The fluid supply device, wherein the attachment portion is provided on the hand controller or the fluid passage.

2. 2. The fluid supply device according to claim 1, A fluid supply device, wherein the hand controller is fixed to the fluid passage so that the sliding direction of the plunger is parallel to the extension direction of the catheter connected to the fluid passage near the fluid passage.

3. 3. The fluid supply device according to claim 2, A fluid supply device, wherein the pusher is pushed in a direction opposite to the direction in which the catheter is viewed from the fluid passage.

4. 2. The fluid supply device according to claim 1, the at least one pump comprises a first pump and a second pump; the fluid passage includes a flow path switching valve that switches whether the first pump or the second pump is connected to the catheter; The hand controller is fixed to the flow path switching valve.

5. 5. The fluid supply device according to claim 4, The control unit switches between controlling the first pump and the second pump depending on a state of the flow path switching valve.

6. 2. The fluid supply device according to claim 1, the hand controller further includes a cylinder housing that houses the cylinder; The mounting portion is installed in the cylinder accommodating portion.

7. 2. The fluid supply device according to claim 1, The control unit causes the pump to perform a pressurizing operation when detecting the pushing action of the plunger.

8. 8. The fluid supply device according to claim 7, The control unit changes a pressurizing speed when causing the pump to perform a pressurizing operation, in accordance with a change in the parameter caused by the pressing of the plunger.

9. 2. The fluid supply device according to claim 1, The control unit causes the pump to perform a decompression operation when detecting the operation of pulling out the plunger.

10. 2. The fluid supply device according to claim 1, The control unit Controlling a lock mode in which the pump is not operated and an unlock mode in which the pump is operated; The fluid supply device transitions from the locked mode to the unlocked mode when the sensor detects that a predetermined operation has been performed on the hand controller.

11. 2. The fluid supply device according to claim 1, The fluid supply device, wherein the sensor is a pressure sensor that detects the pressure of a space that is pushed by the plunger.

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